11. The defendants also used technology designed to avoid AOL's spam filtering mechanisms. 12. Spam filtering imports users'address books to compile a whitelist of allowed senders.13. Spam filtering uses technologies Symantec acquired from Brightmail.14. This difficulty is why feature hashing has been tried for spam filtering at Yahoo! 15. Other features include a personal firewall, email spam filtering , and phishing protection. 16. A low number of false negatives is an indicator of the efficiency of spam filtering . 17. Other features included were a personal firewall, email spam filtering , and phishing protection. 18. Spam filtering software based on this formula is sometimes referred to as a naive Bayes classifier.19. We can already block IP addresses, which serves as a basic form of spam filtering . 20. It is one of the oldest ways of doing spam filtering , with roots in the 1990s.
